GMAW

Question 1

Gas Metal Arc Welding (GMAW)

Answer 1

An arc welding process that uses an arc between a continuous wire electrode and the weld pool

Question 2

Metal Transfer

Answer 2

The manner in which molten metal transfers from the end of the electrode across the welding arc to the weld pool

Question 3

What are the different modes of metal transfer?

Answer 3

Short circuit transfer, globular transfer, spray transfer, pulsed spray transfer (variation of spray transfer)

Question 4

What is a disadvantage to using GMAW?

Answer 4

The process is less portable than SMAW because of the external shielding gas and is not suited for outdoor applications due to shielding gas getting blown away

Question 5

Which polarity is commonly used for GMAW?

Answer 5

DCEP

Question 6

What are the advantages to using DCEP?

Answer 6

Deep penetration and excellent cleaning action

Question 7

What kind of power source does GMAW use?

Answer 7

A direct current (DC) machine capable of producing constant voltage (CV) throughout arc length changes

Question 8

What does MIG stand for?

Answer 8

Metal Inert Gas

Question 9

What are the advantages to using GMAW?

Answer 9

Fast travel speeds, no slag, high deposition rates